It is not possible to craft or obtain Cupronickel Heating Coils, a necessary component for many other Tech Reborn machines and items.

I have tried to create or obtain them through the crafting recipe that is shown in Tech Reborn, but the crafting recipe yields no results. I have also tried to use the "Quick-Craft" option, and that only results in the ingots being put back into my inventory.

This is on the latest versions of Tech Reborn, and I am running it on java 1.21.4, with Fabric as my loader.

This is a REI recipe transfer issue. I'll check where the recipe type error occurs when I have time.

Need to use Rolling Machine

Thank you so much, I had no idea about that machine, and nothing online was helping to point me in the direction of the Roller. The recipe does indeed work fine for me now.

Thank you for reporting this bug.
You can download a preview build to fix it:
https://github.com/TechReborn/TechReborn/actions/runs/12882017766

Currently 1.21.4 is still in beta version. If you encounter any problems, please raise an issue.